Genera and Species of Ilymenoptera. 247 



long wliite liair and witli a silvery pile ; petiole black, curved, 

 longer than usual, nearly as long as tlio hinder tibiae and 

 longer than the third and fourth joints of the antennae. S • 



Long. 18 mm. 



llab. Borneo. 



Antennw black, the flagellum bare, the scape sparsely 

 covered with short white hair. Head alutaceous^ the front 

 and clypeus sparsely punctured ; the cheeks and clypeus are 

 thickly covered with silvery pubescence; the face in the 

 middle is clearly separated and bounded by narrow keels ; 

 the middle of the clypeus is indistinctly keeled, its apex is 

 distinctly depressed and separated. Mandibles rufous be- 

 tween the middle and the teeth ; the hinder tooth is clearly 

 separated above, is wide at the apex, and widely distant from 

 the apical ; the lower apical is bluntly pointed and projects 

 long beyond the short apical one. Thorax shining ; the pro- 

 and mesothorax minutely and closely punctured, the pleurae 

 more closely than the upper surface, which has a slight 

 plumbeous hue ; the scutellum and postscutelluni flat, neither 

 is furrowed down the middle. Median segment closely 

 Iransversely punctured, almost reticulated, and more openly 

 at the base than at the apex. Legs black, pruinose, the pile 

 white, except on the inner side of the hinder tibiae, where it 

 is fulvous or golden, and at the apex rufous ; the claws are 

 bidentate. Wings dark fuscous violaceous, the apex darker, 

 the hinder lighter in tint ; the stigma and nervures are 

 black ; the third cubital cellule at the top is slightly shorter 

 than the second, at the bottom longer than it ; the second 

 recurrent nervure is received nearer the second transverse 

 cubital than is the first ; the transverse median nervure is 

 received behind the transverse basal, the basal two transverse 

 cubital nervures are not so sharply oblique as usual, as in, 

 e. g., Sphex aurulentus; below the base of the stigma is a 

 small black distinct point. The long black petiole is dis- 

 tinctly curved and covered with long white hair; the rest of 

 the abdomen is ferruginous. Tegulse black. 



The eyes distinctly converge on the lower side, where they 

 are separated by a distinctly less distance than they are on 

 the vertex ; all the tarsi are thickly and stoutly spined ; tiie 

 postscutelluni is not sharply or deeply separated from the 

 scutellum, and is scarcely raised above the metanotum; the 

 upper part of the mesopleurai is not raised distinctly, as in 

 aurulentus ; the tibiaj are almost spineless. 



Belongs to the Isodonta-SQciion of Sphex, and comes near 

 to S. nigellus. 



